Description: As a PMI standard and guideline, this guideline is developed through the voluntary participation and joint consultation of relevant personnel
Of.. Its development process brings together a group of volunteers and widely collects the views of people who are interested in the content of this guide. PMI management should be started
Develop processes and rules to promote fairness in negotiations, but not directly involved in writing, or independently tested, evaluated, or verified
The accuracy, completeness of any information contained in the guide or the validity of any judgments contained in this guide.

Description: If any two adjacent digits in the k-ary representation of a natural number n are not adjacent digits, then we say that this number is k-good. Find the number of K good numbers in the L-bit k-ary number. For example, when k = 4 and L = 2 (binary quaternary number), there are 7 good numbers of K, including 11, 13, 20, 22, 30, 31 and 33. With the increase of L and K, the number of K is very large. Please output the value after taking the modulus of 1000000007 as.

Description: Keyboard input two floating-point numbers as the two right triangle sides a and B,
Function fun completed:
When a and B are both numbers greater than 0, calculate the area s of the right triangle and return,
When any value of a and B is less than or equal to 0, i.e. cannot form a triangle, return - 1

Description: Digital telecommunications is a communication method that USES digital signals as carriers to transmit messages, or USES digital signals to carry out digital modulation to the carriers and then transmits them.
It can transmit digital signals, such as telegrams and digital data, as well as analog signals, such as voice and image, which have been digitized.
This document is prokais digital communication matlab routines chapter 9 source code